The World Book of math power. Volume 2., Using math.
The World Book encyclopedia. Volume 12., L.
The World Book encyclopedia. Volume 1., A.
The World Book encyclopedia. : Volume 1. A.
The 1994 World Book year book. : The annual supplement to The World Book encyclopedia.
The 1993 World Book. Year Book. : The annual supplement to the World Book encyclopedia. /
The 1991 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1990.
The 1989 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1988.
The 1990 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1990.
The 1993 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1992.
The 1996 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1995.
The World Book encyclopedia of science. Volume 6., The animal world.
World Book`s young scientist. Volume 4., Planet earth. Water.
World Book`s young scientist. Volume 6., Animals without backbones. Animals with backbones.
World Book`s young scientist. Volume 9., Construction. Machines.
World Book`s young scientist. Volume 3., Atoms & molecules. Gases.
World Book`s young scientist. Volume 5., Living world. Plants.
World Book`s young scientist. Volume 8., Energy. Conservation.
World Book`s young scientist. Volume 2., Light & electricity. Magnetic power.
World Book`s young scientist. Volume 1., Space technology. Computers.
The World Book of word power. Volume 2., Writing and speaking. /